These namespaces provide context for the objects they contain and provide ways to disambiguate objects with the same name. EDM also supports inheritance for entity types where one entity type is derived from another.ĮDM has namespaces, which work as abstract containers for entity types, complex types and associations. Semantics are defined by the storage or hosting environment. However, this model does not define the semantics of operations or conversion over primitive data types. They are proxies for actual primitive data types supported in a storage or hosting environment. The primitive data types supported by EDM include string, Boolean and Int32, among others. Entity sets are grouped logically in an entity container. In the conceptual model, entity types are constructed from properties and describe the structure of top-level concepts. Entity type serves as a template for entities, which represent a specific object with a unique entity key within the entity set, a collection of instances of a specific entity type. The fundamental building block used to describe the structure of data within the entity data model (EDM) is the entity type.
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